Display screen or portion of a device with transitional graphical user interface



FIG. 1 is a front view of a display screen or a portion of a device with a transitional graphical user interface showing a first image;

FIG. 2 is a front view of an enlarged view of the first image;

FIG. 3 is a front view of a second image of the graphical user interface;

FIG. 4 is a front view of a third image thereof;

FIG. 5 is a front view of a fourth image thereof;

FIG. 6 is a front view of a fifth image thereof;

FIG. 7 is a front view of a sixth image thereof;

FIG. 8 is a front view of a seventh image thereof;

FIG. 9 is a front view of an eighth image thereof;

FIG. 10 is a front view of a ninth image thereof; and,

FIG. 11 is a front view of a tenth image thereof.

The broken lines shown in the drawings illustrate portions of the display screen which form no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in the drawings. The process or period in which one image transitions to another image forms no part of the claimed deign. 

CLAIM I claim ornamental design for a display screen or portion of a device with transitional graphical user interface, as shown and described. 